Related Rule
Practice Relating to Rule 84. The Protection of Civilians and Civilian Objects from the Effects of Incendiary Weapons
Ecuador’s Naval Manual (1989) states:
Incendiary weapons such as tracing ammunition, heat-producing bombs, flame throwers, napalm and any other incendiary weapons or agents, are considered lawful. Persons selecting these weapons for use should employ them in such a way as to minimize uncontrolled and indiscriminate effects on the civilian population, in a manner compatible with the fulfilment of the mission and the security of the forces. 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 9-6.